Abstract: Swellable spacer fluids can be useful in subterranean operations for sealing an annular space in a well bore, such as the annular space between a tubular and the subterranean formation or between two concentric tubulars, or for forming a seal inside a well bore in the subterranean formation. One embodiment of such methods involves providing a swellable fluid, wherein the swellable fluid comprises: an aqueous fluid, a crosslinking agent, and at least a plurality of swellable particles; and placing the swellable fluid in a subterranean formation, and allowing the spacer fluid to form a semi-solid crosslinked gel structure in the subterranean formation.

Abstract: A method of servicing a wellbore in contact with a subterranean formation, comprising: placing a wellbore servicing fluid comprising a crosslinkable polymer system and a filler into a lost circulation zone within the wellbore. A method of blocking the flow of fluid through a lost circulation zone in a subterranean formation comprising placing a first composition comprising a packing agent into the lost circulation zone, placing a second composition comprising a crosslinkable polymer system and a filler into the lost circulation zone, and allowing the compositions to set into place.

Abstract: In some embodiments, the invention provides methods useful for subterranean operations, and more particularly, to swellable spacer fluids for sealing an annular space in a well bore, such as the annular space between a tubular and the subterranean formation or between two concentric tubulars or for forming a seal inside a well bore in the subterranean formation. One method involves providing a swellable fluid, wherein the swellable fluid comprises: an aqueous fluid, a crosslinking agent, and at least a plurality of swellable particles; and placing the swellable fluid in a subterranean formation, and allowing the spacer fluid to form a semi-solid crosslinked gel structure in the subterranean formation.

Abstract: A lost circulation composition for use in a wellbore comprising a crosslinkable polymer system and a filler.

Abstract: A method of servicing a wellbore comprising preparing a liquid plug, allowing the liquid plug to polymerize into a highly deformable elastic plug, and placing the highly deformable elastic plug into a wellbore. A method of servicing a wellbore comprising preparing a liquid plug, allowing the liquid plug to polymerize into a highly deformable elastic plug, combining the highly deformable elastic plug with at least one conventional plug to form plug combination, and placing the plug combination into a wellbore. A method of servicing a wellbore comprising preparing a liquid plug, allowing the liquid plug to polymerize into a highly deformable elastic plug, placing the highly deformable elastic plug into a wellbore, and deforming the highly deformable elastic plug.

Abstract: A hydraulic control and actuation system for downhole tools. In a described embodiment, a hydraulic control and actuation system includes an internal chamber serving as a low pressure region and a well annulus serving as an energy source. A valve assembly provides selective fluid communication between alternating opposite sides of a piston and each of the energy source and low pressure region. Displacement of the piston operates a well tool. Operation of the valve assembly is controlled via telemetry between a remote location and an electronic circuit of the system.

Abstract: A method of servicing a wellbore comprising preparing a liquid plug, allowing the liquid plug to polymerize into a highly deformable elastic plug, and placing the highly deformable elastic plug into a wellbore. A method of servicing a wellbore comprising preparing a liquid plug, allowing the liquid plug to polymerize into a highly deformable elastic plug, combining the highly deformable elastic plug with at least one conventional plug to form plug combination, and placing the plug combination into a wellbore. A method of servicing a wellbore comprising preparing a liquid plug, allowing the liquid plug to polymerize into a highly deformable elastic plug, placing the highly deformable elastic plug into a wellbore, and deforming the highly deformable elastic plug.

Abstract: A method of controlling the physical interface between two wellbore servicing fluids during the displacement of one wellbore servicing fluid by another, the method comprising selecting a liquid plug having a viscosity greater than the viscosity of the two wellbore servicing fluids, introducing a first wellbore servicing fluid into the wellbore, introducing a volume of the liquid plug into the wellbore, and introducing a second wellbore servicing fluid into the wellbore, wherein the liquid plug is selected such that the mixing between the two wellbore servicing fluids is minimized.

Abstract: A hydraulic control and actuation system for downhole tools. In a described embodiment, a hydraulic control and actuation system includes an internal chamber serving as a low pressure region and a well annulus serving as an energy source. A valve assembly provides selective fluid communication between alternating opposite sides of a piston and each of the energy source and low pressure region. Displacement of the piston operates a well tool. Operation of the valve assembly is controlled via telemetry between a remote location and an electronic circuit of the system.

Abstract: A hydraulic control and actuation system for downhole tools. In a described embodiment, a hydraulic control and actuation system includes an internal chamber serving as a low pressure region and a well annulus serving as an energy source. A valve assembly provides selective fluid communication between alternating opposite sides of a piston and each of the energy source and low pressure region. Displacement of the piston operates a well tool. Operation of the valve assembly is controlled via telemetry between a remote location and an electronic circuit of the system.

Abstract: An internally oriented perforating apparatus and associated method of perforating provide increased reliability in orienting perforating charges to shoot in desired directions in a well. In a described example, a perforating gun includes a tubular gun carrier, multiple perforating charges, multiple charge mounting structures and multiple rotating supports. The rotating supports are attached between the charge mounting structures, or at least between the perforating charges.

Abstract: An internally oriented perforating apparatus and associated method of perforating provide increased reliability in orienting perforating charges to shoot in desired directions in a well. In a described example, a perforating gun includes a tubular gun carrier, multiple perforating charges, multiple charge mounting structures and multiple rotating supports. The rotating supports are attached between the charge mounting structures, or at least between the perforating charges.